SortedList.Contains メソッド

.NET Framework クラス ライブラリ リファレンス

SortedList.Contains メソッド

SortedList に特定のキーが格納されているかどうかを判断します。

名前空間: System.Collections
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Overridable Function
 Contains ( _
    key As Object _
) As Boolean

Visual Basic (使用法)

Dim instance As SortedList
Dim key As Object
Dim returnValue As Boolean

returnValue = instance.Contains(key)

C#

public virtual bool Contains (
    Object key
)

C++

public:
virtual bool Contains (
    Object^ key
)

J#

public boolean Contains (
    Object key
)

JScript

public function Contains (
    key : Object
) : boolean

パラメータ

key

SortedList 内で検索されるキー。

戻り値
指定した key を持つ要素が SortedList に格納されている場合は true。それ以外の場合は false。

例外

例外の種類	条件
ArgumentNullException	key が null 参照 (Visual Basic では Nothing) です。
InvalidOperationException	比較演算子が例外をスローしました。

解説

SortedList の要素は、SortedList が作成されるときに指定された IComparer の特定の実装か、キー自体が提供する IComparable 実装のいずれかに従って並べ替えられます。

Contains は、IDictionary.Contains を実装します。これは、ContainsKey とまったく同じ動作をします。

このメソッドはバイナリ検索アルゴリズムを実行します。したがって、このメソッドは、O(log n) 操作です。ここで、n は Count です。

使用例

SortedList に特定の要素が格納されているかどうかを判断する方法の例を次に示します。

Visual Basic

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesSortedList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new SortedList.
        Dim mySL As New
 SortedList()
        mySL.Add(2, "two")
        mySL.Add(4, "four")
        mySL.Add(1, "one")
        mySL.Add(3, "three")
        mySL.Add(0, "zero")
        
        ' Displays the values of the SortedList.
        Console.WriteLine("The SortedList contains the following
 values:")
        PrintIndexAndKeysAndValues(mySL)
        
        ' Searches for a specific key.
        Dim myKey As Integer
 = 2
        Dim msg As String
        If mySL.ContainsKey(myKey) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The key ""{0}""
 is {1}.", myKey, msg)
        myKey = 6
        If mySL.ContainsKey(myKey) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The key ""{0}""
 is {1}.", myKey, msg)        
        ' Searches for a specific value.
        Dim myValue As String
 = "three"
        If mySL.ContainsValue(myValue) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The value ""{0}""
 is {1}.", myValue, msg)
        myValue = "nine"
        If mySL.ContainsValue(myValue) Then
            msg = "in the SortedList"
        Else
            msg = "NOT in the SortedList"
        End If
        Console.WriteLine("The value ""{0}""
 is {1}.", myValue, msg)
    End Sub   
    
    
    Public Shared Sub PrintIndexAndKeysAndValues(myList
 As SortedList)
        Console.WriteLine(ControlChars.Tab & "-INDEX-"
 & ControlChars.Tab & _
           "-KEY-" & ControlChars.Tab & "-VALUE-")
        Dim i As Integer
        For i = 0 To myList.Count - 1
            Console.WriteLine(ControlChars.Tab & "[{0}]:"
 & ControlChars.Tab & _
               "{1}" & ControlChars.Tab &
 "{2}", i, myList.GetKey(i), _
               myList.GetByIndex(i))
        Next i
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
' The SortedList contains the following values:
'     -INDEX-    -KEY-    -VALUE-
'     [0]:    0    zero
'     [1]:    1    one
'     [2]:    2    two
'     [3]:    3    three
'     [4]:    4    four
' 
' The key "2" is in the SortedList.
' The key "6" is NOT in the SortedList.
' The value "three" is in the SortedList.
' The value "nine" is NOT in the SortedList. 

C#

using System;
using System.Collections;

public class SamplesSortedList  {

   public static void Main()
  {

      // Creates and initializes a new SortedList.
      SortedList mySL = new SortedList();
      mySL.Add( 2, "two" );
      mySL.Add( 4, "four" );
      mySL.Add( 1, "one" );
      mySL.Add( 3, "three" );
      mySL.Add( 0, "zero" );

      // Displays the values of the SortedList.
      Console.WriteLine( "The SortedList contains the following values:"
 );
      PrintIndexAndKeysAndValues( mySL );

      // Searches for a specific key.
      int myKey = 2;
      Console.WriteLine( "The key \"{0}\" is {1}.", myKey, mySL.ContainsKey(
 myKey ) ? "in the SortedList" : "NOT in
 the SortedList" );
      myKey = 6;
      Console.WriteLine( "The key \"{0}\" is {1}.", myKey, mySL.ContainsKey(
 myKey ) ? "in the SortedList" : "NOT in
 the SortedList" );

      // Searches for a specific value.
      String myValue = "three";
      Console.WriteLine( "The value \"{0}\" is {1}.", myValue,
 mySL.ContainsValue( myValue ) ? "in the SortedList"
 : "NOT in the SortedList" );
      myValue = "nine";
      Console.WriteLine( "The value \"{0}\" is {1}.", myValue,
 mySL.ContainsValue( myValue ) ? "in the SortedList"
 : "NOT in the SortedList" );
   }


   public static void PrintIndexAndKeysAndValues(
 SortedList myList )  {
      Console.WriteLine( "\t-INDEX-\t-KEY-\t-VALUE-" );
      for ( int i = 0; i < myList.Count;
 i++ )  {
         Console.WriteLine( "\t[{0}]:\t{1}\t{2}", i, myList.GetKey(i),
 myList.GetByIndex(i) );
      }
      Console.WriteLine();
   }
}
/* 
This code produces the following output.

The SortedList contains the following values:
    -INDEX-    -KEY-    -VALUE-
    [0]:    0    zero
    [1]:    1    one
    [2]:    2    two
    [3]:    3    three
    [4]:    4    four

The key "2" is in the SortedList.
The key "6" is NOT in the SortedList.
The value "three" is in the SortedList.
The value "nine" is NOT in the SortedList.
*/ 

C++

#using <system.dll>

using namespace System;
using namespace System::Collections;
void PrintIndexAndKeysAndValues( SortedList^ myList )
{
   Console::WriteLine(  "\t-INDEX-\t-KEY-\t-VALUE-" );
   for ( int i = 0; i < myList->Count;
 i++ )
   {
      Console::WriteLine(  "\t[{0}]:\t{1}\t{2}", i, myList->GetKey(
 i ), myList->GetByIndex( i ) );

   }
   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new SortedList.
   SortedList^ mySL = gcnew SortedList;
   mySL->Add( 2, "two" );
   mySL->Add( 4, "four" );
   mySL->Add( 1, "one" );
   mySL->Add( 3, "three" );
   mySL->Add( (int^)0, "zero" );
   
   // Displays the values of the SortedList.
   Console::WriteLine(  "The SortedList contains the following values:"
 );
   PrintIndexAndKeysAndValues( mySL );
   
   // Searches for a specific key.
   int myKey = 2;
   Console::WriteLine(  "The key \"{0}\" is {1}.", myKey, mySL->ContainsKey(
 myKey ) ? (String^)"in the SortedList" : "NOT
 in the SortedList" );
   myKey = 6;
   Console::WriteLine(  "The key \"{0}\" is {1}.", myKey, mySL->ContainsKey(
 myKey ) ? (String^)"in the SortedList" : "NOT
 in the SortedList" );
   
   // Searches for a specific value.
   String^ myValue = "three";
   Console::WriteLine(  "The value \"{0}\" is {1}.", myValue,
 mySL->ContainsValue( myValue ) ? (String^)"in the SortedList"
 : "NOT in the SortedList" );
   myValue =  "nine";
   Console::WriteLine(  "The value \"{0}\" is {1}.", myValue,
 mySL->ContainsValue( myValue ) ? (String^)"in the SortedList"
 : "NOT in the SortedList" );
}

/* 
This code produces the following output.

The SortedList contains the following values:
        -INDEX- -KEY-   -VALUE-
        [0]:    0       zero
        [1]:    1       one
        [2]:    2       two
        [3]:    3       three
        [4]:    4       four

The key "2" is in the SortedList.
The key "6" is NOT in the SortedList.
The value "three" is in the SortedList.
The value "nine" is NOT in the SortedList.
*/

J#

import System.*;
import System.Collections.*;

public class SamplesSortedList
{
    public static void main(String[]
 args)
    {
        // Creates and initializes a new SortedList.
        SortedList mySL = new SortedList();

        mySL.Add((Int32)2, "two");
        mySL.Add((Int32)4, "four");
        mySL.Add((Int32)1, "one");
        mySL.Add((Int32)3, "three");
        mySL.Add((Int32)0, "zero");

        // Displays the values of the SortedList.
        Console.WriteLine("The SortedList contains the following values:");
        PrintIndexAndKeysAndValues(mySL);

        // Searches for a specific key.
        int myKey = 2;

        Console.WriteLine("The key \"{0}\" is {1}.", 
            System.Convert.ToString(myKey), 
            (mySL.ContainsKey((Int32)myKey)) ? 
            "in the SortedList" : "NOT in
 the SortedList");
        myKey = 6;
        Console.WriteLine("The key \"{0}\" is {1}.", 
            System.Convert.ToString(myKey), 
            (mySL.ContainsKey((Int32)myKey)) ? 
            "in the SortedList" : "NOT in
 the SortedList");

        // Searches for a specific value.
        String myValue = "three";
        Console.WriteLine("The value \"{0}\" is {1}.", myValue,
 
            (mySL.ContainsValue(myValue)) ? 
            "in the SortedList" : "NOT in
 the SortedList");
        myValue = "nine";
        Console.WriteLine("The value \"{0}\" is {1}.", myValue,
 
            (mySL.ContainsValue(myValue)) ? 
            "in the SortedList" : "NOT in
 the SortedList");
    } //main

    public static void PrintIndexAndKeysAndValues(SortedList
 myList)
    {
        Console.WriteLine("\t-INDEX-\t-KEY-\t-VALUE-");
        for (int i = 0; i < myList.get_Count();
 i++) {    
            Console.WriteLine("\t[{0}]:\t{1}\t{2}", 
                System.Convert.ToString(i), 
                System.Convert.ToString(myList.GetKey(i)), 
                System.Convert.ToString(myList.GetByIndex(i)));
        }
        Console.WriteLine();
    } //PrintIndexAndKeysAndValues

} //SamplesSortedList

/* 
 This code produces the following output.
 
 The SortedList contains the following values:
     -INDEX-    -KEY-    -VALUE-
     [0]:    0    zero
     [1]:    1    one
     [2]:    2    two
     [3]:    3    three
     [4]:    4    four
 
 The key "2" is in the SortedList.
 The key "6" is NOT in the SortedList.
 The value "three" is in the SortedList.
 The value "nine" is NOT in the SortedList.
 */

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
SortedList クラス
SortedList メンバ
System.Collections 名前空間
ContainsKey
IndexOfKey
その他の技術情報
カルチャを認識しないコレクションの操作の実行